WO2022007079A1 - 纳米复合颗粒及磁控显示装置 - Google Patents

纳米复合颗粒及磁控显示装置 Download PDF

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Publication number
WO2022007079A1
WO2022007079A1 PCT/CN2020/106845 CN2020106845W WO2022007079A1 WO 2022007079 A1 WO2022007079 A1 WO 2022007079A1 CN 2020106845 W CN2020106845 W CN 2020106845W WO 2022007079 A1 WO2022007079 A1 WO 2022007079A1
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Prior art keywords
magnetron
light
display device
layer
nanocomposite
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PCT/CN2020/106845
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English (en)
French (fr)
Inventor
张愉
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TCL China Star Optoelectronics Technology Co Ltd
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TCL China Star Optoelectronics Technology Co Ltd
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Priority to US17/050,143 priority Critical patent/US11988908B2/en
Publication of WO2022007079A1 publication Critical patent/WO2022007079A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/0009—Materials therefor
    • G02F1/0081—Electric or magnetic properties
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/09—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on magneto-optical elements, e.g. exhibiting Faraday effect
    • G02F1/092—Operation of the cell; Circuit arrangements
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
    • C09C3/06—Treatment with inorganic compounds
    • C09C3/063—Coating
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/37—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being movable elements
    • G09F9/375—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being movable elements the position of the elements being controlled by the application of a magnetic field
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y20/00—Nanooptics, e.g. quantum optics or photonic crystals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y25/00—Nanomagnetism, e.g. magnetoimpedance, anisotropic magnetoresistance, giant magnetoresistance or tunneling magnetoresistance
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y40/00—Manufacture or treatment of nanostructures
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/10—Particle morphology extending in one dimension, e.g. needle-like
    • C01P2004/16—Nanowires or nanorods, i.e. solid nanofibres with two nearly equal dimensions between 1-100 nanometer
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/60—Particles characterised by their size
    • C01P2004/64—Nanometer sized, i.e. from 1-100 nanometer
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/42—Magnetic properties
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
    • C09C1/22—Compounds of iron
    • C09C1/24—Oxides of iron
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2202/00—Materials and properties
    • G02F2202/36—Micro- or nanomaterials
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2203/00—Function characteristic
    • G02F2203/02—Function characteristic reflective
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2203/00—Function characteristic
    • G02F2203/48—Variable attenuator

Definitions

  • the present application relates to the field of display technology, and in particular to a nanocomposite particle and a magnetron display device.
  • Smart dimming glass has broad application prospects in many fields.
  • smart partitions are used in business applications; instead of curtains, they can play the functions of partition and privacy protection, sound insulation and noise reduction, and are used in residential and medical institutions; more It can be used in museums, exhibition halls, and banks to play the anti-theft function according to the change of phase.
  • PDLC polymer dispersed liquid crystal, polymer dispersed liquid crystal
  • the smart dimming glass with PDLC as the dimming layer cannot display color images, which limits the use of smart dimming glass. developing.
  • Magnetic nanorods (see “Single-Stimulus-Induced Modulation of Multiple Optical Properties", Advanced. Materials, Hai Li), as a smart optical material, has excellent anisotropic optical properties, and its optical properties can be regulated by a magnetic field. Driven by a magnetic field, the arrangement direction of the magnetic nanorods will change, resulting in a change in its transmittance, and then relying on the phase transition of the magnetic particles, the magnetic nanorods exhibit the same optoelectronic properties as PDLC. However, the display color of the picture controlled by the magnetic nanorods is still limited, which can only be the structural color reflected by the assembly of the nanoparticles. Therefore, how to provide a color smart dimming glass capable of changing multiple colors and regulated by a magnetic field is an urgent problem to be solved at present.
  • the present application provides a nanocomposite particle for magnetron luminescence and a magnetron display device, so as to solve the technical problem that the display color of the screen controlled by the magnetic nanorod is relatively limited.
  • the present application provides a nanocomposite particle for magnetron luminescence, which comprises a magnetic core and a first protective layer, a light-emitting layer and a second protective layer sequentially covering the magnetic core, and the nanocomposite particle is in the long axis direction The length on is different from the length in the direction of the minor axis;
  • the material of the light-emitting layer is an up-conversion material or a quantum dot material.
  • the material of the second protective layer is phenolic resin or silicon dioxide.
  • the material of the magnetic core is a magnetic material selected from at least one of iron element, nickel element and cobalt element;
  • the material of the first protective layer is phenolic resin or silicon dioxide.
  • the material of the magnetic core is a magnetic material selected from iron elements.
  • the material of the magnetic core is triiron tetroxide.
  • the shape of the nanocomposite particles is rod-like, shuttle-like or ellipsoid-like.
  • the present application also provides a nanocomposite particle for magnetron luminescence, which comprises a magnetic core, a first protective layer and a light-emitting layer that sequentially coat the magnetic core, and the nanocomposite particle has a length in the long axis direction equal to The lengths in the short axis direction are different.
  • the nanocomposite particles further comprise a second protective layer, and the second protective layer covers the light-emitting layer.
  • the material of the second protective layer is phenolic resin or silicon dioxide.
  • the material of the magnetic core is selected from magnetic materials of at least one of iron element, nickel element and cobalt element;
  • the material of the first protective layer is phenolic resin or silicon dioxide.
  • the material of the luminescent layer is an up-conversion material or a quantum dot material.
  • the shape of the nanocomposite particles is rod-like, shuttle-like or ellipsoid-like.
  • the present application also provides a magnetron display device, which includes a first substrate and a second substrate disposed opposite to each other, and the magnetron display device includes a dimming layer disposed between the first substrate and the second substrate ;
  • the dimming layer includes a plurality of nanocomposite particles, the nanocomposite particles include a magnetic core, a protective layer and a light-emitting layer sequentially covering the magnetic core, and the length of the nanocomposite particles in the long axis direction is the same as that in the short axis direction. The lengths in the axial direction are different.
  • the material of the light-emitting layer is an up-conversion material or a quantum dot material.
  • the shape of the nanocomposite particles is rod shape, shuttle shape or ellipsoid shape.
  • the magnetron display device of the present application when the nanocomposite particles are in a disordered arrangement state, the light-adjusting layer has a first light transmittance, the magnetron display device is in an atomized state, and does not display a picture ;
  • the light adjustment layer has a second light transmittance
  • the magnetron display device is in a non-atomized state and has a first display screen.
  • the side of the second substrate away from the dimming layer is the light incident side
  • the magnetron display device further includes a reflective layer, and the reflective layer is disposed on the side of the first substrate close to the dimming layer.
  • the side of the first substrate away from the dimming layer is the light incident side
  • the magnetron display device further includes a backlight unit, and the backlight unit is disposed on the light incident side.
  • the backlight unit includes a backlight source
  • the material of the light-emitting layer is an up-conversion material, and the light emitted by the backlight is a combination of infrared light and/or visible light, or
  • the material of the light-emitting layer is quantum dot material, and the light emitted by the backlight source is blue light.
  • both the first substrate and the second substrate are glass substrates.
  • the nanocomposite particles for magnetron luminescence provided by the present application sequentially coat the first protective layer and the light-emitting layer on the outside of the magnetic core, wherein the nanocomposite particles are in the long axis direction.
  • the length of the nanocomposite particle is different from the length in the short axis direction.
  • the orientation of the nanocomposite particles can change with the change of the direction of the external magnetic field.
  • the magnetic core is excited to emit light of some colors.
  • a layer of light-emitting layer is coated on the outside of the magnetic core, and the light-emitting color of the light-emitting layer and the light-emitting color of the magnetic core will be compounded, thereby enriching the light-emitting color of the nanocomposite particles. , thereby enriching the colorfulness of nanocomposite particles when applied to magnetron luminescence.
  • Fig. 1 is the cross-sectional structure schematic diagram of the nanocomposite particle provided in the embodiment of the present application;
  • FIG. 2 is a schematic structural diagram of the magnetron display device provided in the first embodiment of the present application in a disordered arrangement state
  • FIG. 3 is a schematic structural diagram of the magnetron display device provided in the first embodiment of the present application in a first arrangement state
  • FIG. 4 is a schematic cross-sectional structure diagram of the nanocomposite particle provided by the first embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of the magnetron display device provided in the second embodiment of the present application in a disordered arrangement state
  • FIG. 6 is a schematic structural diagram of the magnetron display device provided in the second embodiment of the present application in a first arrangement state.
  • first and second are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, features defined as “first”, “second” may expressly or implicitly include one or more of said features. In the description of the present application, “plurality” means two or more, unless otherwise expressly and specifically defined.
  • the terms “installed”, “connected” and “connected” should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; it can be mechanical connection, electrical connection or can communicate with each other; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction of two elements relation.
  • installed should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; it can be mechanical connection, electrical connection or can communicate with each other; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction of two elements relation.
  • a first feature "on” or “under” a second feature may include direct contact between the first and second features, or may include the first and second features Not directly but through additional features between them.
  • the first feature being “above”, “over” and “above” the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level higher than the second feature.
  • the first feature is “below”, “below” and “below” the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature has a lower level than the second feature.
  • FIG. 1 is a schematic cross-sectional structure diagram of the nanocomposite particle provided in the embodiment of the present application.
  • An embodiment of the present application provides a nanocomposite particle 20 for magnetron luminescence.
  • the nanocomposite particle 20 includes a magnetic core 201 , a first protective layer 202 and a light-emitting layer 203 that sequentially coat the magnetic core 201 .
  • the length of the nanocomposite particles 20 in the long axis direction is different from the length in the short axis direction.
  • the nanocomposite particles 20 for magnetron luminescence provided in the embodiments of the present application are formed by sequentially coating the first protective layer 202 and the light-emitting layer 203 on the outside of the magnetic core 201 , wherein the length of the nanocomposite particles 20 in the long axis direction is the same as that in the The lengths in the short axis direction are different.
  • the orientation of the nanocomposite particles 20 can change with the change of the direction of the external magnetic field.
  • the magnetic cores in the nanocomposite particles 20 can change.
  • 201 is excited to emit light of some colors.
  • a layer of luminescent layer 203 is coated on the outer side of the magnetic core 201.
  • the luminescent color of the luminescent layer 203 and the luminescent color of the magnetic core 201 will be combined, thereby enriching the nanocomposite particles. 20 luminescence color, thereby enriching the colorfulness of the nanocomposite particles 20 when applied to magnetron luminescence.
  • the shape of the nanocomposite particles 20 is rod-like, shuttle-like or ellipsoid-like.
  • the shape of the nanocomposite particles 20 is rod-like.
  • the material of the magnetic core 201 is selected from magnetic materials of at least one of iron element, nickel element and cobalt element.
  • the material of the magnetic core 201 is selected from the magnetic material of iron element.
  • the material of the magnetic core 201 is iron tetroxide.
  • the material of the first protective layer 202 is phenolic resin or silicon dioxide.
  • the material of the first protective layer 202 is phenolic resin. Since the phenolic resin has good high temperature resistance and chemical stability, the dimensional stability and structural integrity of the magnetic core 201 can be maintained, so as to facilitate the formation of the magnetic core 201 structure with good morphology.
  • the nanocomposite particles 20 further include a second protective layer 204 .
  • the second protective layer 204 covers the light emitting layer 203 .
  • the material of the second protective layer 204 is phenolic resin or silicon dioxide.
  • the material of the second protective layer 204 is silicon dioxide.
  • the arrangement of the silicon dioxide layer can effectively improve the monodispersity of the nanocomposite particles 20, avoid aggregation between the particles, and is beneficial to obtain the nanocomposite particles 20 with good morphology, thereby helping to improve the structural stability of the nanocomposite particles 20. .
  • the material of the first protective layer 202 can be other materials that have a protective effect and can maintain the shape of the magnetic core 201
  • the material of the second protective layer 204 can be other materials that have a protective effect and can improve the nanocomposite particles 20 .
  • the materials of the first protective layer 202 and the second protective layer 204 may be the same or different, and the materials of the first protective layer 202 and the second protective layer 204 are not specifically limited in this application.
  • the material of the light-emitting layer 203 is an up-conversion material or a quantum dot material.
  • the material of the light-emitting layer 203 is an up-conversion material
  • the magnetic core 201 in the nanocomposite particle 20 will be excited after being excited. Lights of different colors are emitted, at this time, the emission color of the up-conversion material and the emission color of the magnetic core 201 will be combined, so that the nanocomposite particles 20 can emit light of more colors, thereby enriching the emission colors of the nanocomposite particles 20. , thereby enriching the colorfulness of the nanocomposite particles 20 when applied to magnetron luminescence.
  • the specific type of the up-conversion material can be selected according to actual application requirements, which is not specifically limited in this application.
  • the magnetic core 201 in the nanocomposite particles 20 will emit different colors by adjusting the direction of the magnetic field under the stimulation of the external light and the driving of the external magnetic field.
  • the luminescent color of the quantum dot material and the luminescent color of the magnetic core 201 will be combined, so that the nanocomposite particles 20 can emit more colors of light, thereby enriching the luminescent color of the nanocomposite particles 20, thereby enriching the The colorfulness of nanocomposite particles 20 when applied to magnetron luminescence.
  • the quantum dot materials can be perovskite quantum dots or cadmium sulfide quantum dots, etc.
  • the selection of specific materials can be set according to actual application needs, and the application does not specifically limit the types of quantum dot materials.
  • electroluminescence or photoluminescence quantum dot materials can also be selected, and details are not described here.
  • the above-mentioned preparation method of the nanocomposite particles 20 for magnetron luminescence specifically includes the following steps:
  • the reaction solvent may be an organic solvent such as ethylene glycol.
  • the weak alkaline solution can be ammonia water, which is used to adjust the pH value of the solution to keep it at about 8.
  • the weak alkaline solution may also be other alkaline solutions for adjusting pH, and the application does not specifically limit the solution type of the weak alkaline solution.
  • a light-emitting material is provided, and the light-emitting material is specifically an up-conversion material or a quantum dot material, and the preparation method of the up-conversion material or the quantum dot material can be referred to in the prior art, which will not be repeated here.
  • the prepared yttrium oleate is first and ytterbium oleate in a ratio of 4:1 to prepare a ytterbium oleate yttrium solution to obtain the precursor of the light-emitting layer 203; then, dissolve the ferric tetroxide coated with the phenolic resin layer in a small amount of oleic acid and ten octaene mixed solution to obtain a mixed solution of ferriferric oxide magnetic nanorods; then, in an argon atmosphere, the above mixed solution was heated to 280 o C at a rate of 20 o C/min, and heated at 280 o C Drop the ytterbium yttrium oleate solution, and
  • a solvent which can be a mixed solution of ethanol and water (volume ratio is 1:1); then, add an alkaline solution Such as ammonia water, keep the solution weakly alkaline and maintain the pH at about 9; then, add ethyl orthosilicate and stir mechanically for 10 hours to obtain the crude nanocomposite particles 20.
  • the crude nanocomposite particles 20 are purified. Specifically, the crude nanocomposite particles 20 are first centrifuged; then, the solid mixture obtained by centrifugation is washed, and the washing solvent is ethanol; and finally, the solvent is evaporated to obtain the purified nanocomposite particles 20 .
  • the nanocomposite particles 20 for magnetron luminescence provided by the embodiments of the present application are obtained by sequentially coating the first protective layer 202 , the light emitting layer 203 and the second protective layer 204 on the outer side of the magnetic core 201 , thereby obtaining good morphology and stability.
  • a layer of luminescent layer 203 is coated on the outer side of the magnetic core 201, and the luminescent color of the luminescent layer 203 and the luminescent color of the magnetic core 201 will be combined, thereby enriching the luminescent color of the nanocomposite particles 20,
  • the colorfulness of the nanocomposite particles 20 when applied to magnetron luminescence is enriched.
  • FIG. 2 is a schematic structural diagram of the magnetron display device provided in the first embodiment of the application in a disordered arrangement state
  • FIG. 3 is the magnetron display device provided by the first embodiment of the application. Schematic diagram of the structure in the first arrangement state
  • FIG. 4 is a schematic diagram of the cross-sectional structure of the nanocomposite particles provided in the first embodiment of the application.
  • the first embodiment of the present application provides a magnetron display device 100 , which includes a first substrate 11 and a second substrate 12 disposed opposite to each other.
  • the magnetron display device 100 includes a light adjustment layer 10A disposed between the first substrate 11 and the second substrate 12 .
  • the dimming layer 10A includes a plurality of nanocomposite particles 10 .
  • the nanocomposite particle 10 includes a magnetic core 101 and a protective layer 102 and a light-emitting layer 103 sequentially covering the magnetic core 101 .
  • the length of the nanocomposite particles 10 in the long axis direction is different from the length in the short axis direction.
  • a plurality of nanocomposite particles 10 are arranged in the dimming layer 10A.
  • the nanocomposite particles 10 include a magnetic core 101 and a protective layer 102 sequentially covering the magnetic core 101 and emit light. layer 103, and the length of the nanocomposite particles 10 in the long axis direction is different from the length in the short axis direction.
  • the arrangement and orientation of the nanocomposite particles 10 can follow. The direction of the external magnetic field changes, and the magnetic core 101 in the nanocomposite particle 10 is excited to emit light of some colors.
  • the luminescent color and the luminescent color of the magnetic core 101 are combined, thereby enriching the luminescent color of the nanocomposite particles 10 , thereby enriching the display color of the dimming layer 10A, thereby widening the color gamut of the magnetron display device 100 .
  • the nanocomposite particle 10 further includes another protective layer 104 , and the other protective layer 104 covers the light-emitting layer 103 .
  • the protective layer 102 is defined as the first protective layer 102
  • the other protective layer 104 is defined as the second protective layer 104 .
  • the magnetron display device 100 further includes a reflective layer 13 , and the reflective layer 13 is disposed on the side of the first substrate 11 close to the dimming layer 10A. This setting can improve the reflection effect of the magnetron display device 100 .
  • the magnetron display device 100 in the present application may be a smart dimming glass, a display panel, etc.
  • the first embodiment of the present application only takes the magnetron display device 100 as an intelligent dimming glass as an example for description, but Not limited to this.
  • both the first substrate 11 and the second substrate 12 are glass substrates.
  • the specific material of the glass substrate is selected according to actual application requirements, which is not limited in this application.
  • the nanocomposite particle 10 is an optical material with dual response characteristics of magnetic response and optical response, by adjusting the direction of the external magnetic field, the arrangement orientation of the nanocomposite particle 10 can be controlled to have different arrangement states, thereby showing different optical properties.
  • the dimming layer 10A when the nanocomposite particles 10 are in a disordered arrangement state, the dimming layer 10A has the first light transmittance, the magnetron display device 100 is in an atomized state, and no picture is displayed.
  • the dimming layer 10A has the second light transmittance, the magnetron display device 100 is in the non-fogging state, and has the first display screen.
  • the first arrangement state in this application may be a vertical arrangement state, a horizontal arrangement state or an oblique arrangement state. Not limited to this.
  • the nanocomposite particles 10 in the dimming layer 10A are in a disordered and irregular arrangement state. At this time, the transmittance of the nanocomposite particles 10 to light is low, so that the first light transmittance lower, so the smart dimming glass is in a foggy state and does not display the picture.
  • the specific size of the first light transmittance is determined by factors such as the material of the nanocomposite particles 10 and the wavelength of the incident light, which will not be repeated here.
  • the nano-composite particles 10 in the dimming layer 10A are in a state of vertical arrangement. At this time, the transmittance of the nano-composite particles 10 to light is high, so that the second light transmittance is high, so the light can be adjusted intelligently.
  • the glass is in a non-atomized state, and by changing the direction of the magnetic field, the arrangement of the nanocomposite particles 10 can be changed, thereby changing the light transmittance of the dimming layer 10A, so that the brightness of the smart dimming glass can be adjusted.
  • the nanocomposite particles 10 are coated with the light-emitting layer 103 , so that the light-emitting colors of the nanocomposite particles 10 can be enriched, so that the display screen of the dimming layer 10A is more abundant, thereby broadening the intelligent dimming.
  • the multiplicity of glass is the case where the nanocomposite particles 10 are in different arrangements.
  • the specific size of the second light transmittance is determined by factors such as the material, arrangement and orientation of the nanocomposite particles 10 and the wavelength of the incident light, which will not be repeated here.
  • the nanocomposite particles 10 in the first embodiment of the present application may also have a second arrangement state, a third arrangement state or a fourth arrangement state, etc., wherein the second arrangement state , the third arrangement state or the fourth arrangement state is an arrangement state different from the first arrangement state, and the arrangement state of the nanocomposite particles 10 can be changed by changing the direction of the magnetic field, so that the nanocomposite particles 10 have different transmittance to light. At the same time, it can also have different display colors in different arrangement states.
  • the magnetron display device 100 is a reflective type, the incident light is natural light, and the side of the second substrate 12 away from the light adjustment layer 10A is the light incident side.
  • the nanocomposite particles 10 when the external magnetic field is in an off state, the nanocomposite particles 10 are in a disordered arrangement, and the transmittance of the dimming layer 10A to natural light is low, so that the smart dimming glass is in an atomized state and no picture is displayed.
  • the nanocomposite particles 10 When the magnetic field is on, the nanocomposite particles 10 have a first arrangement state. By adjusting the direction of the magnetic field, the nanocomposite particles 10 have different luminescent colors under the illumination of natural light, thus enriching the display color of the smart dimming glass , which realizes the control of the display screen of the smart dimming glass.
  • the magnetic response characteristics of the nanocomposite particles 10 it is also possible to adjust the local display color of the smart dimming glass by changing the arrangement state of some of the nanocomposite particles 10, so that the smart dimming glass can be adjusted according to actual application needs.
  • the reflective magnetron display device 100 in the first embodiment does not need to use a backlight, it can greatly reduce the power consumption of the display device while enriching the colorfulness of the display screen, thereby helping to improve the product market. Competitiveness.
  • a plurality of nano-composite particles 10 are arranged in the dimming layer 10A, and the nano-composite particles 10 include a magnetic core 101 and a protective layer sequentially covering the magnetic core 101 and The light-emitting layer 103, and the length of the nanocomposite particles 10 in the long-axis direction is different from the length in the short-axis direction, when stimulated by external light, driven by an external magnetic field, the nanocomposite particles 10
  • the alignment orientation can be With the change of the direction of the external magnetic field, the magnetic cores 101 in the nanocomposite particles 10 are excited to emit light of some colors.
  • the light-emitting color of the light-emitting layer 103 is related to the light-emitting of the magnetic core 101.
  • the colors will be compounded, thereby enriching the emission colors of the nanocomposite particles 10 , thereby enriching the display colors of the dimming layer 10A, and broadening the color gamut of the magnetron display device 100 .
  • FIG. 5 is a schematic structural diagram of the magnetron display device provided in the second embodiment of the application in a disordered arrangement state
  • FIG. 6 is the magnetron display device provided by the second embodiment of the application. Schematic diagram of the structure in the first arrangement state.
  • the difference between the second embodiment of the present application and the first embodiment is that the magnetron display device 100 is a transmission type, and the side of the first substrate 11 away from the light adjustment layer 10A is the light incident side.
  • the magnetron display device 100 further includes a backlight unit 14, and the backlight unit 14 is disposed on the light incident side.
  • the backlight unit 14 includes a backlight source.
  • the light emitted by the backlight source is a combination of infrared light and/or visible light.
  • the specific type of light emitted by the backlight can be selected according to the specific type of the up-conversion material, so that the absorption of light energy by the nanocomposite particles 10 can be maximized, and the luminous efficiency of the nanocomposite particles 10 can be effectively improved.
  • the image quality of the display device 100 is controlled.
  • the material of the light-emitting layer 103 is a quantum dot material
  • the light emitted by the backlight source is blue light. Since the quantum dot material has a high absorption rate for blue light, the luminous efficiency of the nanocomposite particles 10 can be effectively improved by incident light with blue light, thereby enhancing the image quality of the magnetron display device 100 .
  • the smart dimming glass does not display the picture.
  • the nanocomposite particles 10 When the magnetic field is turned on, if the nanocomposite particles 10 are in a vertical arrangement, most of the light emitted by the backlight cannot pass through the nanocomposite particles 10. Therefore, under the excitation of a small amount of backlight, the nanocomposite particles 10 themselves exhibit a luminescent color. , so that the magnetron display device 100 has a corresponding display screen.
  • the nanocomposite particles 10 are in a state of inclined arrangement or horizontal arrangement, at this time, the light emitted by the backlight can pass through the nanocomposite particles 10, and the light emitted by the backlight source and the light emitted by the nanocomposite particles 10 themselves are compounded, thereby making the intelligent
  • the display color of the dimming glass is richer, thus broadening the color gamut of the smart dimming glass.
  • the specific arrangement shape of the nanocomposite particles 10 can be adjusted by adjusting the direction of the magnetic field, so that the nanocomposite particles 10 have different luminescent colors, so that the magnetron display device 100 can display different pictures.
  • the transmissive magnetron display device 100 provided by the second embodiment of the present application is provided by arranging a plurality of nanocomposite particles 10 in the dimming layer 10A.
  • the nanocomposite particles 10 include a magnetic core 101 and a protective layer that sequentially coats the magnetic core 101 and The light-emitting layer 103, and the length of the nanocomposite particles 10 in the long-axis direction is different from the length in the short-axis direction, when stimulated by external light, driven by an external magnetic field, the nanocomposite particles 10
  • the alignment orientation can be With the change of the direction of the external magnetic field, the magnetic core 101 in the nanocomposite particle 10 is excited and emits light of some colors.
  • the color and the emission color of the magnetic core 101 are combined, thereby enriching the emission color of the nanocomposite particles 10 , thereby enriching the display color of the dimming layer 10A, thereby widening the color gamut of the magnetron display device 100 .
  • the image quality of the magnetron display device 100 can be greatly improved, thereby meeting the application requirements of magnetron display in more scenarios .
  • the nanocomposite particles for magnetron luminescence provided by the present application sequentially coat the first protective layer and the light-emitting layer on the outside of the magnetic core, wherein the nanocomposite particles are in the long axis direction.
  • the length of the nanocomposite particle is different from the length in the short axis direction.
  • the orientation of the nanocomposite particles can change with the change of the direction of the external magnetic field.
  • the magnetic core is excited to emit light of some colors.
  • a layer of luminescent layer is coated on the outer side of the magnetic core, and the luminescent color of the luminescent layer and the luminescent color of the magnetic core will be combined, thereby enriching the luminescence of the nanocomposite particles. color, thus enriching the colorfulness of nanocomposite particles when applied to magnetron luminescence.

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Abstract

一种纳米复合颗粒（10，20）及磁控显示装置（100），纳米复合颗粒（10，20）包括磁性核（101，201）和依次包覆磁性核（101，201）的第一保护层（102，202）和发光层（103，203），纳米复合颗粒（10，20）在长轴方向上的长度与在短轴方向上的长度不同。

Description

纳米复合颗粒及磁控显示装置 技术领域
本申请涉及显示技术领域，具体涉及一种纳米复合颗粒及磁控显示装置。
 背景技术
智能调光玻璃在多领域拥有广阔的应用前景，例如，作为投影幕布，智能隔断应用于商务应用当中；取代窗帘，发挥隔断和隐私保护的功能，隔音消杂，应用于住宅及医疗机构；更可根据相态的转变，而应用于博物馆，展馆，银行当中，发挥防盗功能。目前，PDLC（polymer dispersed liquid crystal，聚合物分散液晶）被广泛应用于智能调光玻璃领域当中，但以PDLC为调光层的智能调光玻璃无法显示彩色画面，进而限制了智能调光玻璃的发展。
 技术问题
磁性纳米棒（请参阅“Single-Stimulus-Induced Modulation of Multiple Optical Properties”，Advanced. Materials，Hai Li）作为一种智能光学材料，具有优良的各向异性光学特性，并能够通过磁场调控其光学性能。在磁场驱动下，磁性纳米棒的排列方向会发生改变，导致其透过率发生改变，进而依靠磁性颗粒相态的转变，使磁性纳米棒展现出与PDLC相同的光电性质。然而，由于磁性纳米棒调控的画面显示颜色依然是有限的，只能为由纳米颗粒组装而反射的结构色。因此，如何提供一种能够变换多重色彩，并采用磁场调控的彩色智能调光玻璃，是目前亟待解决的问题。
 技术解决方案
本申请提供一种用于磁控发光的纳米复合颗粒以及磁控显示装置，以解决采用磁性纳米棒调控的画面显示颜色较为局限的技术问题。
本申请提供一种用于磁控发光的纳米复合颗粒，其包括磁性核和依次包覆所述磁性核的第一保护层、发光层和第二保护层，所述纳米复合颗粒在长轴方向上的长度与在短轴方向上的长度不同；
所述发光层的材料为上转换材料或量子点材料。
在本申请的用于磁控发光的纳米复合颗粒中，所述第二保护层的材料为酚醛树脂或二氧化硅。
在本申请的用于磁控发光的纳米复合颗粒中，所述磁性核的材料为选自铁元素、镍元素和钴元素中的至少一者的磁性材料；
所述第一保护层的材料为酚醛树脂或二氧化硅。
在本申请的用于磁控发光的纳米复合颗粒中，所述磁性核的材料为选自铁元素的磁性材料。
在本申请的用于磁控发光的纳米复合颗粒中，所述磁性核的材料为四氧化三铁。
在本申请的用于磁控发光的纳米复合颗粒中，所述纳米复合颗粒的形状为棒状、梭状或椭球状。
本申请还提供一种用于磁控发光的纳米复合颗粒，其包括磁性核和依次包覆所述磁性核的第一保护层和发光层，所述纳米复合颗粒在长轴方向上的长度与在短轴方向上的长度不同。
在本申请的用于磁控发光的纳米复合颗粒中，所述纳米复合颗粒还包括一第二保护层，所述第二保护层包覆于所述发光层。
在本申请的用于磁控发光的纳米复合颗粒中，所述第二保护层的材料为酚醛树脂或二氧化硅。
在本申请的用于磁控发光的纳米复合颗粒中，所述磁性核的材料选自铁元素、镍元素和钴元素中的至少一者的磁性材料；
所述第一保护层的材料为酚醛树脂或二氧化硅。
在本申请的用于磁控发光的纳米复合颗粒中，所述发光层的材料为上转换材料或量子点材料。
在本申请的用于磁控发光的纳米复合颗粒中，所述纳米复合颗粒的形状为棒状、梭状或椭球状。
本申请还提供一种磁控显示装置，其包括相对设置的第一基板和第二基板，所述磁控显示装置包括设置于所述第一基板和所述第二基板之间的调光层；
所述调光层包括多个纳米复合颗粒，所述纳米复合颗粒包括磁性核和依次包覆所述磁性核的保护层和发光层，所述纳米复合颗粒在长轴方向上的长度与在短轴方向上的长度不同。
在本申请的磁控显示装置中，所述发光层的材料为上转换材料或量子点材料。
在本申请的磁控显示装置中，所述纳米复合颗粒的形状为棒状、梭状或椭球状。
在本申请的磁控显示装置中，当所述纳米复合颗粒处于无序排列状态时，所述调光层具有第一透光率，所述磁控显示装置为雾化状态，且不显示画面；
当所述纳米复合颗粒处于第一排列状态时，所述调光层具有第二透光率，所述磁控显示装置为非雾化状态，且具有第一显示画面。
在本申请的磁控显示装置中，所述第二基板远离所述调光层的一侧为入光侧；
所述磁控显示装置还包括一反射层，所述反射层设置于所述第一基板靠近所述调光层的一面上。
在本申请的磁控显示装置中，所述第一基板远离所述调光层的一侧为入光侧；
所述磁控显示装置还包括一背光单元，所述背光单元设置于所述入光侧上。
在本申请的磁控显示装置中，所述背光单元包括一背光源；
所述发光层的材料为上转换材料，所述背光源发出的光为红外光和/或可见光的组合，或
所述发光层的材料为量子点材料，所述背光源发出的光为蓝光。
在本申请的磁控显示装置中，所述第一基板和所述第二基板均为玻璃基板。
 有益效果
相较于现有技术中的纳米复合颗粒，本申请提供的用于磁控发光的纳米复合颗粒通过在磁性核外侧依次包覆第一保护层和发光层，其中，纳米复合颗粒在长轴方向上的长度与在短轴方向上的长度不同，当受到外界光的刺激时，在外界磁场的驱动下，该纳米复合颗粒的排列取向能够随外界磁场方向的改变而发生变化，纳米复合颗粒中的磁性核被激发而发出部分颜色的光，本申请通过在磁性核外侧包覆一层发光层，发光层的发光颜色与磁性核的发光颜色会发生复合，进而能够丰富纳米复合颗粒的发光色彩，从而丰富了纳米复合颗粒应用于磁控发光时的多彩性。
 附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本申请实施例提供的纳米复合颗粒的剖面结构示意图；
图2是本申请第一实施例提供的磁控显示装置在无序排列状态下的结构示意图；
图3是本申请第一实施例提供的磁控显示装置在第一排列状态下的结构示意图；
图4是本申请第一实施例提供的纳米复合颗粒的剖面结构示意图；
图5是本申请第二实施例提供的磁控显示装置在无序排列状态下的结构示意图；
图6是本申请第二实施例提供的磁控显示装置在第一排列状态下的结构示意图。
 本发明的实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
在本申请的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”、“顺时针”、“逆时针”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个所述特征。在本申请的描述中，“多个”的含义是两个或两个以上，除非另有明确具体的限定。
在本申请的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接或可以相互通讯；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。
在本申请中，除非另有明确的规定和限定，第一特征在第二特征之“上”或之“下”可以包括第一和第二特征直接接触，也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正下方和斜下方，或仅仅表示第一特征水平高度小于第二特征。
下文的公开提供了许多不同的实施方式或例子用来实现本申请的不同结构。为了简化本申请的公开，下文中对特定例子的部件和设置进行描述。当然，它们仅仅为示例，并且目的不在于限制本申请。此外，本申请可以在不同例子中重复参考数字和/或参考字母，这种重复是为了简化和清楚的目的，其本身不指示所讨论各种实施方式和/或设置之间的关系。此外，本申请提供了的各种特定的工艺和材料的例子，但是本领域普通技术人员可以意识到其他工艺的应用和/或其他材料的使用。
请参阅图1，图1为本申请实施例提供的纳米复合颗粒的剖面结构示意图。
本申请实施例提供一种用于磁控发光的纳米复合颗粒20，纳米复合颗粒20包括磁性核201和依次包覆磁性核201的第一保护层202和发光层203。纳米复合颗粒20在长轴方向上的长度与在短轴方向上的长度不同。
本申请实施例提供的用于磁控发光的纳米复合颗粒20通过在磁性核201外侧依次包覆第一保护层202和发光层203，其中，纳米复合颗粒20在长轴方向上的长度与在短轴方向上的长度不同，当受到外界光的刺激时，在外界磁场的驱动下，该纳米复合颗粒20的排列取向能够随外界磁场方向的改变而发生变化，纳米复合颗粒20中的磁性核201被激发而发出部分颜色的光，本实施例通过在磁性核201外侧包覆一层发光层203，发光层203的发光颜色与磁性核201的发光颜色会发生复合，进而能够丰富纳米复合颗粒20的发光色彩，从而丰富了纳米复合颗粒20应用于磁控发光时的多彩性。
具体的，纳米复合颗粒20的形状为棒状、梭状或椭球状。
在本申请实施例中，纳米复合颗粒20的形状为棒状。
具体的，在纳米复合颗粒20中，磁性核201的材料选自铁元素、镍元素和钴元素中的至少一者的磁性材料。
在本申请实施例中，磁性核201的材料选自铁元素的磁性材料。具体的，磁性核201的材料为四氧化三铁。
具体的，第一保护层202的材料为酚醛树脂或二氧化硅。
在本申请实施例中，第一保护层202的材料为酚醛树脂。由于酚醛树脂具有良好的耐高温性和化学稳定性，进而能够保持磁性核201尺寸的稳定性和结构的完整性，以有利于形成良好形貌的磁性核201结构。
具体的，纳米复合颗粒20还包括一第二保护层204。第二保护层204包覆于发光层203。其中，第二保护层204的材料为酚醛树脂或二氧化硅。
在本申请实施例中，第二保护层204的材料为二氧化硅。二氧化硅层的设置能够有效改善纳米复合颗粒20的单分散性，避免颗粒之间发生聚集，有利于得到具有良好形貌的纳米复合颗粒20，从而有利于提高纳米复合颗粒20的结构稳定性。
需要说明的是，第一保护层202的材料可以为其他具有保护作用并能够维持磁性核201形貌的物质，第二保护层204的材料可以为其他具有保护作用并能够改善纳米复合颗粒20单分散性的物质，且第一保护层202和第二保护层204的材料可以相同，也可以不同，本申请对第一保护层202及第二保护层204的材料均不作具体限定。
具体的，发光层203的材料为上转换材料或量子点材料。
在本申请实施例中，当发光层203的材料为上转换材料时，在外界光的刺激及外界磁场的驱动下，通过调控磁场的方向，纳米复合颗粒20中的磁性核201受到激发后会发出不同颜色的光，此时上转换材料的发光颜色与磁性核201的发光颜色会发生复合，进而使纳米复合颗粒20能够发出更多颜色的光，由此能够丰富纳米复合颗粒20的发光色彩，从而丰富了纳米复合颗粒20应用于磁控发光时的多彩性。
需要说明的是，上转换材料的具体种类可以根据实际应用需求进行选择，本申请对此不作具体限定。
在本申请实施例中，当发光层203的材料为量子点材料时，在外界光的刺激及外界磁场的驱动下，通过调控磁场的方向，纳米复合颗粒20中的磁性核201会发出不同颜色的光，此时量子点材料的发光颜色与磁性核201的发光颜色会发生复合，进而使纳米复合颗粒20能够发出更多颜色的光，由此能够丰富纳米复合颗粒20的发光色彩，从而丰富了纳米复合颗粒20应用于磁控发光时的多彩性。
需要说明的是，量子点材料可以为钙钛矿量子点或硫化镉量子点等，具体材料的选择可以根据实际应用需要进行设定，本申请对量子点材料的种类不作具体限定。此外，根据实际应用需求，还可以选择电致发光或者光致发光的量子点材料，在此不再赘述。
在本申请实施例中，上述用于磁控发光的纳米复合颗粒20的制备方法具体包括以下步骤：
S101：制备包覆有第一保护层202的磁性核201；
首先，利用溶剂热法，氯化铁为铁源，柠檬酸钠为还原剂，制备具有棒状形态，尺寸均匀的三氧化二铁纳米棒。其中，反应溶剂可以为乙二醇等有机溶剂。
接着，利用溶胶-凝胶法，以间苯二酚和甲醛为原料，在弱碱性溶液当中，以三氧化二铁纳米棒为核，构建具有保护功能的酚醛树脂层，以作为第一保护层202。其中，弱碱性溶液可以为氨水，其用于调节溶液的pH值，以使其保持在8左右。另外，弱碱性溶液还可以为其他用于调节pH值的碱性溶液，本申请对弱碱性溶液的溶液种类不作具体限定。
最后，在100 oC的反应条件下，利用氢气对三氧化二铁纳米棒进行还原，从而得到包覆有酚醛树脂层的四氧化三铁磁性纳米棒，即得到包覆有第一保护层202的磁性核201。
S102：在第一保护层202外侧形成发光层203；
具体的，提供发光材料，发光材料具体为上转换材料或量子点材料，上转换材料或量子点材料的制备方法均可以参照现有技术，在此不再赘述。
以发光层203的材料为上转换材料为例进行说明，具体的，当以四氟钇钠为上转换材料中的基质材料、掺杂的稀土元素为镱时，首先将制备好的油酸钇和油酸镱以4:1的比例混合制备出油酸镱钇溶液，以得到发光层203的前驱体；然后，将包覆有酚醛树脂层的四氧化三铁溶于少量的油酸和十八烯混合溶液中，以得到四氧化三铁磁性纳米棒的混合液；接着，在氩气气氛下，将上述混合液以20 oC/min的速率加热至280 oC，并在280 oC下滴加油酸镱钇溶液，通过控制溶液的滴加速率、滴加量及滴加次数来调控发光层203的厚度；最后，将上述生成的产物进行离心沉淀，然后采用有机溶剂将离心得到的固体混合物进行洗涤，除去溶剂，即得到包覆有发光层203的四氧化三铁@酚醛树脂磁性纳米棒。
S103：在发光层203外侧包覆第二保护层204。
首先，将依次包覆有第一保护层202和发光层203的磁性核201超声分散于溶剂中，溶剂可以为乙醇与水的混合溶液（体积比为1:1）；然后，加入碱性溶液如氨水，保持溶液具有弱碱性，并使pH维持在9左右；接着，加入正硅酸乙酯，并机械搅拌10h，以得到纳米复合颗粒20粗品。
然后，对纳米复合颗粒20粗品进行提纯。具体的，首先对纳米复合颗粒20粗品进行离心分离；接着，将离心分离得到的固体混合物进行洗涤，洗涤溶剂为乙醇；最后，蒸发溶剂，即得到纯化后的纳米复合颗粒20。
本申请实施例提供的用于磁控发光的纳米复合颗粒20通过在磁性核201外侧依次包覆第一保护层202、发光层203和第二保护层204，进而得到具有良好形貌及稳定性的棒状纳米复合颗粒20，在外界光的刺激及磁场的驱动下，该纳米复合颗粒20的排列取向能够随外界磁场方向的改变而发生变化，纳米复合颗粒20中的磁性核201被激发而发出部分颜色的光，本实施例通过在磁性核201外侧包覆一层发光层203，发光层203的发光颜色与磁性核201的发光颜色会发生复合，进而能够丰富纳米复合颗粒20的发光色彩，从而丰富了纳米复合颗粒20应用于磁控发光时的多彩性。
请参阅图2至图4，其中，图2为本申请第一实施例提供的磁控显示装置在无序排列状态下的结构示意图；图3为本申请第一实施例提供的磁控显示装置在第一排列状态下的结构示意图；图4为本申请第一实施例提供的纳米复合颗粒的剖面结构示意图。
本申请第一实施例提供一种磁控显示装置100，其包括相对设置的第一基板11和第二基板12。磁控显示装置100包括设置于第一基板11和第二基板12之间的调光层10A。调光层10A包括多个纳米复合颗粒10。纳米复合颗粒10包括磁性核101和依次包覆磁性核101的保护层102和发光层103。纳米复合颗粒10在长轴方向上的长度与在短轴方向上的长度不同。
本申请第一实施例提供的磁控显示装置100通过在调光层10A内设置多个纳米复合颗粒10，该纳米复合颗粒10包括磁性核101和依次包覆磁性核101的保护层102和发光层103，且纳米复合颗粒10在长轴方向上的长度与在短轴方向上的长度不同，当受到外界光的刺激时，在外界磁场的驱动下，该纳米复合颗粒10的排列取向能够随外界磁场方向的改变而发生变化，纳米复合颗粒10中的磁性核101被激发而发出部分颜色的光，本第一实施例通过在磁性核101外侧包覆一层发光层103，发光层103的发光颜色与磁性核101的发光颜色会发生复合，进而丰富了纳米复合颗粒10的发光色彩，由此丰富了调光层10A的显示色彩，从而拓宽了磁控显示装置100的色域。
在本申请第一实施例中，纳米复合颗粒10还包括另一保护层104，该另一保护层104包覆于发光层103。需要说明的是，为方便描述本申请实施例，将保护层102定义为第一保护层102，另一保护层104定义为第二保护层104。
另外，本第一实施例中纳米复合颗粒10的材料及制备方法均可以参照前述实施例中纳米复合颗粒20的描述，在此不再赘述。
在本申请第一实施例中，磁控显示装置100还包括一反射层13，反射层13设置于第一基板11靠近调光层10A的一面上。该设置可以提高磁控显示装置100的反射效果。
需要说明的是，本申请中的磁控显示装置100可以为智能调光玻璃、显示面板等，本申请第一实施例仅以磁控显示装置100为智能调光玻璃为例进行说明，但并不限于此。
在本申请第一实施例中，第一基板11和第二基板12均为玻璃基板。该玻璃基板的具体材料根据实际应用需求进行选择，本申请对此不作限定。
由于纳米复合颗粒10是一种具有磁响应和光响应双重响应特性的光学材料，因而，通过调控外界磁场的方向，能够控制纳米复合颗粒10的排列取向，使其具有不同的排列状态，进而表现出不同的光学性能。
在本申请第一实施例中，当纳米复合颗粒10处于无序排列状态时，调光层10A具有第一透光率，磁控显示装置100为雾化状态，且不显示画面。当纳米复合颗粒10处于第一排列状态时，调光层10A具有第二透光率，磁控显示装置100为非雾化状态，且具有第一显示画面。
需要说明的是，本申请中的第一排列状态可以为垂直排列状态、水平排列状态或倾斜排列状态，本申请第一实施例仅以第一排列状态为垂直排列状态为例进行说明，但并不限于此。
具体的，当外界磁场关闭时，调光层10A内的纳米复合颗粒10处于无序的不规则排列状态，此时，纳米复合颗粒10对光的透过率较低，使得第一透光率较低，因而智能调光玻璃处于雾化状态，且不显示画面。
其中，第一透光率的具体大小由纳米复合颗粒10的材料以及入射光的波长等因素决定，在此不再赘述。
当外界磁场开启时，调光层10A内的纳米复合颗粒10处于垂直排列状态，此时，纳米复合颗粒10对光的透过率较高，使得第二透光率较高，因而智能调光玻璃处于非雾化状态，且通过改变磁场的方向，能够使纳米复合颗粒10的排列形态发生改变，进而改变调光层10A的透光率大小，从而可以实现对智能调光玻璃亮度的调控。
此外，在入射光的刺激下，通过改变磁场的方向，纳米复合颗粒10处于不同的排列形态时，其发光颜色会相应发生变化，进而使得智能调光玻璃具有不同的显示色彩。相较于单一的磁性核101，由于纳米复合颗粒10中包覆有发光层103，从而能够丰富纳米复合颗粒10的发光颜色，使得调光层10A的显示画面更加丰富，进而拓宽了智能调光玻璃的多彩性。
其中，第二透光率的具体大小由纳米复合颗粒10的材料、排列取向以及入射光的波长等因素决定，在此不再赘述。
需要说明的是，当外界磁场处于开启状态时，本申请第一实施例中的纳米复合颗粒10还可以具有第二排列状态、第三排列状态或第四排列状态等，其中，第二排列状态、第三排列状态或第四排列状态为与第一排列状态不同的排列状态，且通过改变磁场的方向可以改变纳米复合颗粒10的排列状态，进而使得纳米复合颗粒10对光具有不同的透过率，同时，在不同排列状态下还可以具有不同的显示色彩。
进一步的，在本申请第一实施例中，磁控显示装置100为反射型，入射光为自然光，第二基板12远离调光层10A的一侧为入光侧。
具体的，当外界磁场处于关闭状态时，纳米复合颗粒10处于无序排列状态，调光层10A对自然光的透过率较低，使得智能调光玻璃处于雾化状态，且不显示画面。当磁场处于开启状态时，纳米复合颗粒10具有第一排列状态，通过对磁场方向的调控，在自然光的照射下，纳米复合颗粒10具有不同的发光色彩，因而丰富了智能调光玻璃的显示色彩，实现了对智能调光玻璃的显示画面的调控。
另外，根据纳米复合颗粒10的磁响应特性，还可以通过对部分纳米复合颗粒10排列状态的改变，来实现对智能调光玻璃局部显示色彩的调控，从而可以根据实际应用需要，实现对智能调光玻璃局部显示画面的调控，进而拓宽了智能调光玻璃的应用。
进一步的，由于本第一实施例中的反射型磁控显示装置100不需要使用背光，进而在丰富显示画面多彩性的同时，还可以大大降低显示装置的功耗，从而有利于提升产品的市场竞争力。
本申请第一实施例提供的反射型磁控显示装置100通过在调光层10A内设置多个纳米复合颗粒10，该纳米复合颗粒10包括磁性核101和依次包覆磁性核101的保护层和发光层103，且纳米复合颗粒10在长轴方向上的长度与在短轴方向上的长度不同，当受到外界光的刺激时，在外界磁场的驱动下，该纳米复合颗粒10的排列取向能够随外界磁场方向的改变而发生变化，纳米复合颗粒10中的磁性核101被激发而发出部分颜色的光，本实施例通过发光层103的设置，发光层103的发光颜色与磁性核101的发光颜色会发生复合，进而丰富了纳米复合颗粒10的发光色彩，由此丰富了调光层10A的显示色彩，拓宽了磁控显示装置100的色域。
请参阅图5和图6，其中，图5为本申请第二实施例提供的磁控显示装置在无序排列状态下的结构示意图；图6为本申请第二实施例提供的磁控显示装置在第一排列状态下的结构示意图。
本申请第二实施例与第一实施例的不同之处在于：磁控显示装置100为透射型，第一基板11远离调光层10A的一侧为入光侧。磁控显示装置100还包括一背光单元14，背光单元14设置于入光侧上。背光单元14包括一背光源。
在本申请第二实施例中，当发光层103的材料为上转换材料时，背光源发出的光为红外光和/或可见光的组合。背光源发出光的具体类型可以根据上转换材料的具体种类进行选择，以使纳米复合颗粒10对光能的吸收达到最大化，进而可以有效提高纳米复合颗粒10的发光效率，从而有利于增强磁控显示装置100的画质。
当发光层103的材料为量子点材料时，背光源发出的光为蓝光。由于量子点材料对蓝光具有较高的吸收率，进而通过以蓝光入射光，能够有效提高纳米复合颗粒10的发光效率，从而增强磁控显示装置100的画质。
具体的，当磁场处于关闭状态时，纳米复合颗粒10处于无序排列状态，调光层10A对光的透过率较低，此时智能调光玻璃处于雾化状态，由于没有磁场的驱动，因而智能调光玻璃不显示画面。
当磁场开启时，若纳米复合颗粒10处于垂直排列状态，此时背光源发出的大部分光线都无法透过纳米复合颗粒10，因而在少量背光的激发下，纳米复合颗粒10本身呈现出发光色彩，进而使得磁控显示装置100具有相应的显示画面。若纳米复合颗粒10处于倾斜排列或水平排列状态，此时背光源发出的光可以透过纳米复合颗粒10，则通过背光源发出的光与纳米复合颗粒10本身发出的光的复合，进而使得智能调光玻璃的显示色彩更加丰富，由此拓宽了智能调光玻璃的色域。
进一步的，通过对磁场方向的调控可以调节纳米复合颗粒10的具体排列形态，进而使得纳米复合颗粒10具有不同的发光色彩，从而使得磁控显示装置100能够显示不同的画面。
本申请第二实施例提供的透射式磁控显示装置100通过在调光层10A内设置多个纳米复合颗粒10，该纳米复合颗粒10包括磁性核101和依次包覆磁性核101的保护层和发光层103，且纳米复合颗粒10在长轴方向上的长度与在短轴方向上的长度不同，当受到外界光的刺激时，在外界磁场的驱动下，该纳米复合颗粒10的排列取向能够随外界磁场方向的改变而发生变化，纳米复合颗粒10中的磁性核101被激发而发出部分颜色的光，本实施例通过在磁性核101外侧包覆一层发光层103，发光层103的发光颜色与磁性核101的发光颜色会发生复合，进而丰富了纳米复合颗粒10的发光色彩，由此丰富了调光层10A的显示色彩，从而拓宽了磁控显示装置100的色域。
另外，相较于自然光，由于纳米复合颗粒10对背光源发出的光的吸收率较高，因而能够大大提升磁控显示装置100的画质，从而可以满足更多场景的磁控显示的应用需求。
相较于现有技术中的纳米复合颗粒，本申请提供的用于磁控发光的纳米复合颗粒通过在磁性核外侧依次包覆第一保护层和发光层，其中，纳米复合颗粒在长轴方向上的长度与在短轴方向上的长度不同，当受到外界光的刺激时，在外界磁场的驱动下，该纳米复合颗粒的排列取向能够随外界磁场方向的改变而发生变化，纳米复合颗粒中的磁性核被激发而发出部分颜色的光，本实施例通过在磁性核外侧包覆一层发光层，发光层的发光颜色与磁性核的发光颜色会发生复合，进而能够丰富纳米复合颗粒的发光色彩，从而丰富了纳米复合颗粒应用于磁控发光时的多彩性。
以上对本申请实施例进行了详细介绍，本文中应用了具体个例对本申请的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本申请的方法及其核心思想；同时，对于本领域的一般技术人员，依据本申请的思想，在具体实施方式及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本申请的限制。

Claims (20)

  1. 一种用于磁控发光的纳米复合颗粒，其包括磁性核和依次包覆所述磁性核的第一保护层、发光层和第二保护层，所述纳米复合颗粒在长轴方向上的长度与在短轴方向上的长度不同；
    所述发光层的材料为上转换材料或量子点材料。
  2. 根据权利要求1所述的用于磁控发光的纳米复合颗粒，其中，所述第二保护层的材料为酚醛树脂或二氧化硅。
  3. 根据权利要求1所述的用于磁控发光的纳米复合颗粒，其中，所述磁性核的材料为选自铁元素、镍元素和钴元素中的至少一者的磁性材料；
    所述第一保护层的材料为酚醛树脂或二氧化硅。
  4. 根据权利要求3所述的用于磁控发光的纳米复合颗粒，其中，所述磁性核的材料为选自铁元素的磁性材料。
  5. 根据权利要求4所述的用于磁控发光的纳米复合颗粒，其中，所述磁性核的材料为四氧化三铁。
  6. 根据权利要求1所述的用于磁控发光的纳米复合颗粒，其中，所述纳米复合颗粒的形状为棒状、梭状或椭球状。
  7. 一种用于磁控发光的纳米复合颗粒，其中，所述纳米复合颗粒包括磁性核和依次包覆所述磁性核的第一保护层和发光层，所述纳米复合颗粒在长轴方向上的长度与在短轴方向上的长度不同。
  8. 根据权利要求7所述的用于磁控发光的纳米复合颗粒，其中，所述纳米复合颗粒还包括一第二保护层，所述第二保护层包覆于所述发光层。
  9. 根据权利要求8所述的用于磁控发光的纳米复合颗粒，其中，所述第二保护层的材料为酚醛树脂或二氧化硅。
  10. 根据权利要求7所述的用于磁控发光的纳米复合颗粒，其中，所述磁性核的材料为选自铁元素、镍元素和钴元素中的至少一者的磁性材料；
    所述第一保护层的材料为酚醛树脂或二氧化硅。
  11. 根据权利要求7所述的用于磁控发光的纳米复合颗粒，其中，所述发光层的材料为上转换材料或量子点材料。
  12. 根据权利要求7所述的用于磁控发光的纳米复合颗粒，其中，所述纳米复合颗粒的形状为棒状、梭状或椭球状。
  13. 一种磁控显示装置，其包括相对设置的第一基板和第二基板，其中，所述磁控显示装置包括设置于所述第一基板和所述第二基板之间的调光层；
    所述调光层包括多个纳米复合颗粒，所述纳米复合颗粒包括磁性核和依次包覆所述磁性核的保护层和发光层，所述纳米复合颗粒在长轴方向上的长度与在短轴方向上的长度不同。
  14. 根据权利要求13所述的磁控显示装置，其中，所述发光层的材料为上转换材料或量子点材料。
  15. 根据权利要求13所述的磁控显示装置，其中，所述纳米复合颗粒的形状为棒状、梭状或椭球状。
  16. 根据权利要求13所述的磁控显示装置，其中，当所述纳米复合颗粒处于无序排列状态时，所述调光层具有第一透光率，所述磁控显示装置为雾化状态，且不显示画面；
    当所述纳米复合颗粒处于第一排列状态时，所述调光层具有第二透光率，所述磁控显示装置为非雾化状态，且具有第一显示画面。
  17. 根据权利要求16所述的磁控显示装置，其中，所述第二基板远离所述调光层的一侧为入光侧；
    所述磁控显示装置还包括一反射层，所述反射层设置于所述第一基板靠近所述调光层的一面上。
  18. 根据权利要求16所述的磁控显示装置，其中，所述第一基板远离所述调光层的一侧为入光侧；
    所述磁控显示装置还包括一背光单元，所述背光单元设置于所述入光侧上。
  19. 根据权利要求18所述的磁控显示装置，其中，所述背光单元包括一背光源；
    所述发光层的材料为上转换材料，所述背光源发出的光为红外光和/或可见光的组合，或
    所述发光层的材料为量子点材料，所述背光源发出的光为蓝光。
  20. 根据权利要求13所述的磁控显示装置，其中，所述第一基板和所述第二基板均为玻璃基板。
PCT/CN2020/106845 2020-07-07 2020-08-04 纳米复合颗粒及磁控显示装置 Ceased WO2022007079A1 (zh)

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